Floor-surfacing machine.



J. HERB.

FLOOR SUEFAUING MACHINE.

APPLICATION FILED DEC. a1. 1908.

1,030,255, Patented June 18, 1912.

5 SHEETS-SHEET 1.

B1 Mm Affomey J. HERE.

YLOOR SURFAGING MACHINE.

APPLICATION FILED DEG.31,1908.

Patented June 18, 1912.

5 SHEETSSHEET 2.

06. G. p/fi J. HERB.

FLOOR SURFAGING MACHINE.

APPLICATION FILED 31:0.31, 1908.

Patented June 18, 1912.

amwm

Quota,

5 SHEETS-SHEET 3.

O O vvJOoO Wm WK J. HERB.

FLOOR SURFAOING MAGHINE.

APPLICATION FILED DEO.31,190B.

1,030,255, Patented June 18, 1912.

5 SHEETS-SHEE'I' 4.

A v i nuanfoz Qvi-tn eases G /%O M J I up. a w I alter-mu UNITED STATES PATENT OFFICE.

JOHN HERB, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR T0 FLOOR SANDING AND POLISHING MACHINE COMPANY, CORPORATION OF PENNSYLVANIA.

OF PHILADELPHIA, PENNSYLVANIA, A

, FLOOR-SURFACING macnmn.

Specification of Letters Patent.

Application filed December 31, 1908. Serial No. 470,175.

facing floors and similar or analogous work,

consisting in a machine of that class which is described in the application Serial N umber 336,573, filed September 28, 1906, and in certain particulars, comprising the abrading roll and the'extension roll, this application is a division of the-said application.

The present invention comprises improve- I ments in the abrading and extension rolls,

in the means for removing by pneumatic force the abradedmaterial, in means where by the control of the propelling force of the machine is secured through the movement of the guiding handle, and in themeans for applying weights to the frame of the abrading roll to regulate its Working pressure.

This latter feature was also described in the said application and in respect of the same the present application is a division of the said former application.

The invention consists in the parts and combinations thereof hereinafter set forth and claimed.

In order to make the invention more clearly understood, there is shown in the accompanying drawings means for carrying the. .same into practical efi'ect, without limiting the improvements, in their useful applications, to the particular construction which, for the sake of example,have been illustrated. i

In said drawingsFigure 1 is a side view of a floor surfacing machine embodying the invention. Fig. 2 1s a longitudinal sectional view of the abrading roll. Fig. 3 is an end view ofthe same. Fig. 4 is a cross section of the abrading roll and a portion of the clamping devices. Fig. .5 is a longitudinal sectional View of the shaft of the abrad- "ing roll, and of the'extensionroll applied thereto. Fig. 6 is an end 'view of the exten sion roll with its parts separated for the application of theabrading material. Fig. 7 is an elevation of'the same. Fig. 8 is a plan view of one of the sides of the frame with its weighting means. Fig. 9 is a side view, showing the means for weighting the frame of the abrading roll. Fig. 10 is a front view, part1 in section, showing the air duct and hood and a portion of the fan "casing. F iga ll is a sectional view on the line XI of Fig; 10 illustratingihe means for adjustably clamping the parts of the blower conduit. Fig. 12'is a side elevation of one of the propelling 'wheels, and neighboring parts, illustrating the clutch mechanism which is controlled by the guiding handle. Fig. 13 is a plan view illustrating the clutch mechanism with part'of the casing in section. Fig. 14 is an elevation of the shaft supporting bearing and clutch controlling cam, looking toward the side of the machine. Fig. 15 is a view of the same, from the rear of the machine. Fig. 16 is a detail parts which aid in supporting the hood, and a portion of the hood.

Referring to the drawings, 1 is the frame of the carriage supported at the rear by propelling wheels Q and at the front by caster wheels 3.

4 is an electric motor mounted on the frame of the carriage and adapted to receive looking view showing in front elevation the.

Patented June 18, 1912. l

power from the flexible conductors of an electric circuit, in such manner thatthe carriage may move from place to place during the performance of the work of the machine, as in. the surfacing of a floor. For the purpose of propelling the machine the motor is connected with the propelling wheels 2 bya suitable power transmitt ng gearing 5. I

6 is the frame of the abrading roll plvot- A ally connected with the carria e frame at I the pivotal points or the axial hne 7, which latter extends transversely of the machine. The forward part of the frame 6 extends beyond the carriage frame, and is there provided with bearings 8 to receive the shaft of the abrading roll, the latter being rotated at high speed from the motor 4 by a beltor chain 11 running on pulleys 9 and 10 fixed respectively on the shaft of the motor and on the shaft of the abrading roll.

The abrading roll is shown at 12 and is mounted loosely on the shaft 13, the rotation of the shaft being communicated to .der 16 which has a the roll through the means of the sand paper or other sheet of abrading materlal, in a manner hereinafter more particularly described. The abrading roll consists of heads 14 and 15 which are loose on the shaft 13 and are united by 'a hollow metal cylinface of the cylinder and are secured to the bar 19 at 23, said arms 21 acting to strongly press the bar outward toward and against the abrading material and the inner surface of the cylinder.

24 is an aperture in the cylinder 16 through which a tool 25 may be inserted, as indicated in dotted lines in Fig.4, to press the bar 19 inward and allow one edge of the sheet of abrading material tobe inserted through the slot 17 and into the space thus left between the bar and the cylinder, after which the tool 25 is withdrawn and the abrading material will be clamped as above described. The other edge of the abrading material, after thesame-has been wrapped around the roll, is also introduced through the slot 17 and clamped by suitable devices fixed on the roll shaft 13. These last-mentioned clamping devices are preferably constructed as follows: 26 is a clamping jaw fixed on the shaft 13 by means of bearings 27 and set screws 28, and 29 is an opposing clamping aw mounted to turn on the shaft 13 by bearings 30 which are arranged at suitable intervals along the shaft and encircle the latter. At the opposite side of the shaft from the jaws 26:and 29 are bars 31 and 32 which are connected by any suitable means, such for instance as arms 33 and 34,

with the bearings 27 and 30 respectively. 35 indicates one or more springs arranged to press apart the bars 31 and 32 and consequently to press together the jaws 26 and 29. A convenient arrangement for such springs'is to place them in the form of a -coil around the shaft 13 with their ends pressing in opposite directions against theinner faces of the bars 31 and 32. The edge of the abrading material is clamped between the jaws 26 and 29, and pins 36 may be provided on the inner faces of one or both of the jaws to aid in grasping the abrading material.

The head 14 is formed with'an opening longitudinal but pref;

the slot 17' be parallel therewith. Betweenv -.ing material 37, which may be in the form of a slot concentric with the roll axis, through which opening project the ends of the clamping jaws 26 and 29. The jaw 26 is a little shorter than the jaw 29 and is provided with a pin 38 upon which a tool 39 may be pivotally applied, as indicated in dotted lines in Fig. 3, to pry upon the jaw 29 and force the jaws apart while the second edge of the abrading material is inserted. Upon the re. moval of the tool 39, the spring or springs 35 will cause the jaws, to be pressed strongly toward each other upon material so introduced between them. -As the shaft 13 turns in the direction indicated by the arrow in Fig. 3, the abrading material which is wrapped around the cylinder will be pulled upon by the jaws 26 and 29 and will in turn pull upon the clamping bar19, thereby turning the roll in the said direction. At the sametime the rubbing of the abrading material upon the floor tends to stretch the same, or produce a slack, which it is necessary to take up as fast as it may be produced and at all times keep the abradtight upon itscylinder; There are accordingly provided automatic take-up devices on the roll which permit a free relative turning of the shaft 13 and roll 12 in one direction, but which have a ratchet or other engagement t6 prevent such relative turning in the other direction and keep the abrading material tight. These automatic take-up devices consist preferably of a ratchet 40 attached by screws 41 to the roll head 14 near the opening 37.

having a tooth 44 which engages the teeth of I the ratchet 40 as the jaws 26 and 29 move in the slot 37 The dog 42 has a weighted and handle end 45 by which it may be manipulated to be released from the ratchet and which tends by centrifugal force to press outward and keep the tooth 44 in engagernent with the ratchet when the abrading roll is rotated. The teethof the ratchet are so turned that the cylinder and ratchet can move freely in a direction opposite to the direction of rotation of the shaft 13, but will be prevented by the dog from moving in the same direction, relative to the shaft 13, as that in which the shaft is turned.

The operation of the above described devices to automatically take-up the slack of and maintain the tightness of the abrading material will be obvious without further explanation.

The frame 6 is preferably inclined downward from the side pivots 7 in substantially the same direction as the driving belt 11, and the side bars of the said frame are pro vided with slots 46 inclo-sing the pivots 7 to permit the frame and abrading roll to be adjusted forward or rearward on said pivots, such adjustment being effected by screws 47 which engage beging pieces inclosed in the slot 46 and incl ing the pivots 7. At suitable points the frame 6 is provided with means for holding readily removable and attachable weights by which the pressure of p means for mounting the said weights con-' sist in the following: 48' and 51 indicate two lugs, the pair of which is arranged at each side of the frame 6-, formed with or at tached thereto and extending outward therefrom. 49 is a vertical pin screwed or otherwise fixed in the lug 51 and extending above and through the lug 48. 50 is a weight having a vertical aperture so that it maybe slipped over the'pin 49, either above or belowthe lug 48, or bothabove and below when two or more weights are employed at each side of the frame 6 and the maximum cutting action of the abrading roll is required. One of these weights is shown in Figs. 8 and 9 as applied below the lug 48 and held in place by the other lug 51. A weight may also be applied above the lug 48 as indicated in dotted lines in Fig. 9. These weights are preferably of metal and may be subdivided into weights of smaller size than that indicated in the said figures.

It will be understood that Figs. 8 and 9 show the weighting means at one side only of the frame 6 and that a similar weighting means is applied to the frame 6 at both sides of the machine.

53' is a hood extending transversely of the machine in front of the abrading roll and down nearly to the floor surface, it being in transverse length approximately equal to the length of the roll. That face of the hood 53 which is toward the rear of the roll is open from the bottom up foraabout two thirds of the height of the roll, above which point the hood is closed at the rear as well as atthe front. From the upper part of the hood extends a duct section 52 which may be telescoped within an upper duct section I so as to turn therein in the vertical longituv 54. The latter is turned at a right angle in a direction transverse of the machine and has a circumferential flange 55 which fits within the eye port-ion 56 of the fan casing dinal planes of the machine, so as to permit the hood to be lifted up away from the abrading roll as indicated in dotted lines in Fig. 1, to permit the removal or manipulation of the roll for the frequent renewal of the abradingmaterial. At the sides of the hood 52 are inclosing flanges 57 which extend rearwardly for some little distance past the front edge of the roll at the sides of the latter so as to completely inclose the space where the abraded dust is delivered.

58 indicates a loop or socket attached to the hood, one at each side of the same, and

adapted to fit over a forward projection 59 of the roll frame 6. By the loops 58 the hood is held off the floor, but close to the same, and the raising of the hood above described is readily permitted.

The roll frame 6 is preferably provided with mechanism by'which it can be raised or lowered to move the abrading roll out of or into contact with the floor, such for instancethe mechanism described in the above mentioned application, and such raising and 'may be securely-held by a clamp 81, operated by a screw 82, as shown in Fig. 11.

One of the duct portions may be formed with a slit 83 to allow of its compression upon the other duct portion. I It is often necessary to operate upon a floor close to a surrounding wall, and for such purpose there is provided an extension roll 61 which may be applied to or removed from the abrading roll shaft 13 (Figs. 5 and 6). To this end the shaft 13 is made hollow from endv to end for the reception of the extension shaft 62. Thelatter is provided with a shoulder 63 which fits within the end of the shaft 13, each end of the latter being. correspondingly enlarged and shouldered interiorly at-67, so that the ex-v tension roll 61 may be applied at either side of the machine.

64 is a shoulder on the extension shaft which abuts against the end of the shaft 13, and 65 is a nut which screws upon the other end of the extension shaft to abut against the other end of the shaft 13 and firmly unite the two concentric shafts. 66 is a collar or washer which enters the hollow interior enlargement of the shaft. Beyond'th'e shoulder ,64 the shaft 62 has a laterally extending portion 68 which carries the extension roll 61. 5 E

69 is a collar formed or fixed on the part 68 and having an outwardly presented concaved cone 70, and 71 is a nut having an inwardly presented hollow cone 72 and screwed upon the outer end of the part 68, the collars 69 and 71 being arranged at a distance from each other so as to retain between them the two parts of the extension roll. The latter is formed in two halves,

in the abutting faces of the two halves of the roll near its periphery. The pins of one-half of the roll are arranged to enter holes 75 in the opposing half of the roll, as seen in Fig. 7. It is also preferred to form the abutting faces of the two halves of the roll with slots 76 extending diagonally outward (Fig. 6) for the reception of the extreme edges of the abrading material. The two halves of the roll 61 are covered,

, and connected by, as by a hinge, a sheet of leather, canvas, or other suitable material, shown at 77. Each end of the roll 61 is formed with an outwardly presented convex cone 78, so that when the abutting faces of the two halves are fitted together and the'nut 71 is screwed toward the collar 69, the said halves are forced tightly together to hold the abrading material and are may work close to a wall or base board,

The shaft'portion 68 may be made-separate from the main shaft portion 62,and

such construction is indicated in Fig. 5,

where the end of the shaft 62 is shown as extending into a "corresponding socket 80 in the part 68, the two shaft portions being securely united by a transverse key 81 which passes through both of said portions. In this case it is preferred to form the cone or shoulder 63 on the inner end of the part 68. The part 68 is attached to the shaft 62 so that the shoulder 63 is rigid with the shaft, and operatively is a part thereof.

It-will be understood that the improve ments described are not confined to use with an electric motor, as a gasolene or other suitable motor may be employed.

The transmitting gearing 5 comprises a downwardly extending worm shaft 84 and a worm wheel 85 dri en thereby and loosely mounted on the shaft 86 of the propelling wheels 2, as described in the former application above referred to.

While the improvements hereinbefore described may be employed in combination with the propelling clutch mechanism of the said application, it is preferred to combine the clutch mechanism with the guiding handle in such manner that the raising or lowering of the guiding, handle to apply the abrading roll to the floor or to remove it from the fioor will be automatically ac-.

companied by the engaging or disengaging of the clutch mechanism, thus allowing of the complete nlanipulationand control of the machine and its propelling mechanism by the guiding handle alone. This is preferably accomplished by the following means: 87 is the guiding handle pivotally mounted on the shaft 86 at each side of the machine, with which handle are connected the adjusting bars 88 which serve to raise or lower the abrading roll and its frame. 89 is a clutch member formed on the inner face of the worm wheel 85 and adapted to be engaged by a corresponding movable clutchmember 90. The latter is arranged to slide on the shaft 86 and is caused to turn therewith by known means such, as a spline. 92 is a groove formed in the movable clutch memberand which is engaged by pins 93 fixed in a yoke 94. This yoke is pivotally mounted by a screw pin 95 ona lug 96, the latter being screwed laterally into or otherwise aflixed to the side of the handle 87. The I said yoke is provided with a lever arm 97 which extends rearwardly and upwardly and terminates in a controlling knob or pin 98. This latter is preferably in the form of an anti-friction roller arranged on an axis 99 which isradial to the shaft 86. When the guiding handle 87 is raised or lowered, theknob 98 is caused to follow a forward or rearward path concentric with the shaft 86. 100 is a knob-controlling cam which is fixed to some suitable part of the frame of the machine, preferably being attached by bolts 101 to'the bearing frame 102 of the Worm shaft. The said cam engages the inner and outer faces of the knob 98 and v i is so shaped that when a guiding handle 87 is raised, the abrading roll lowered into action upon the floor and it is desired that the machine shall be propelled, the knob 98 is pressed inward by the cam and the yoke 94 turned so as to cause the clutch member 90 to engage the clutch member 89 on the rotating worm wheel; and when the guiding handle is lowered to lift the abrad,

ingroll from the floor, at which time it is not desirable that the machine shall continue to be propelled by power, the knob 98 is pressed outward by the cam and the clutch members separated. It is preferred not to form the immediate support of the knob 98 integral with the yoke arm '97, but rather to provide-a yielding connection to prevent an abrupt engagement and possible breaking of the clutch teeth. To this end the outer portion 103 of the arm 97 is pivotally connected by a pin lO l with the main portion of the arm, and is formed with an arm 105 betweenwhich and the arm 97 is mounted a strong spring 106;

This spring is preferably held in place on a pin 107 which is fixed on the arm 97 and enters an aperture 108 in the arm 105. This spring acts to'press the arm 105 away from the arm 97, and the action of the spring to.

turn the outer arm portion 103 is limited by shoulders at 109 and 110 where the two arm portions abuttogether. By the above 1,oso;255

described means the movable clutch memher is forced into engagement with the clutch member 89 by a yielding pressure.

Connected therewith, said roll having a shaft which is loose relative to the roll, a securing means on the roll for one end of the abrading material, a securing means on the shaft for .the other end of the abrading material, and devices for automatically permitting the turning of the shaft relative'to the roll in one direction to take up the slack of the abrading material, said devices operating to prevent relative turnin of the roll and shaft in the other direction and thereby operating to keep the abrading material taut,

substantially as set forth.

2; In a floor surfacing machine, the combination of a carriage, a hollow shaft connected therewith, an abrading roll on the hollow shaft, an extension shaft fitting within the hollow shaft, means for connecting the extension shaft fixedly with the hollow shaft, and an extension roll fixed on the extension shaft. M

3. In a floor surfacing machine, the combination of a carriage, a hollow shaft connected therewith having its end enlarged interiorly, an abrading roll on the hollow shaft, an extension shaft within the hollow shaft and having a convex enlargement to fitthe interior enlargement of the shaft, means for clamping the extension shaft to the hollow shaft, and an extension roll on the extension, shaft, substantially as set forth.

4. In a floor surfacing machine, the combination of a carriage, an abrading roll movably connected therewith, a motor on the carriage, a fan and easing therefor on the carriage connected with sa1d motor to be driven thereby, an air duct having a pivotal connectionwith the fan casing to turn in the vertical longitudinal planes of the machine, and a hood carried by the duct and extending along the roll in front thereof, substantially as set. forth.

5. In a floor-surfacing machine, the combination of the carriage, an abrading roll connected with the carriage and having.

means whereby it may be raised and lowered, a fan and easing therefor on the carriage, an air duct having a pivotal connection ona horizontal axis with the fan casingon an axial line parallel with the abrading roll, a hood connectedwith the said duct and extending alon the abrading roll, and

an extensible jointnn the air duct, substantially as and for the purposes described.

6. In a floor surfacing machine, the combination of a carriage, an abrading roll and bearings therefor connected with the carriage and having means whereby the roll may raised and lowered, a fan and easing there- 7. In a floor surfacing machine, the combination of a carriage, an abrading roll and bearings therefor, a frame connected with the carriage, carrying the said bearings and movable upward and downward relative to the carriage, forward extensions on the said frame, a fan and easing therefor on'the carriage, an air duct having a pivotal connection on a horizontal axis with the fan casing, a hood connected with the said duct and extending along the abrading roll, an extensible joint in the air duct, and loops or sockets on the hood and removably supported by the said forward extensions of the frame, substantially as set-forth.

8. In a floor surfacing machine, the combination of a carriage, a frame connected therewith and having means whereby it may be raised or lowered, pins fixed on the said frame, and weights removably strung on the said pins, substantially as set forth.

9. In a floor surfacing machine, the combination of a carriage, a frame connected therewith and movable upward and downward, pins fixed on the said frame and extending upward and downward from their points of attachment, a weight-sustaining means on the downwardly extending pins, and weights arranged to be removably applied to said pins above and below such points of attachmentof the pins, substantially as set forth.

10. In a floor surfacing machine, the combination of a carriage, an abrading roll mounted-thereon, propelling wheels for the carriage, a propelling motor on the carriage, mechanism connecting the motor with the propelling wheels comprising separable clutch members, a guiding handle for the carriage,and means whereby the movement of the handle is caused to engage or dlsengage the clutch members, substantially as set forth.

11. In a floor surfacing machine, the combination of a carriage, an abrading roll movably mounted thereon to be lowered to orraised from the floor, propelling wheels for the carriage, a propelling motor on the carriage, mechanism connecting the motor with the propelling wheels comprising separable clutch members, a guiding handle for the carriage having means for raising or lowering the abrading roll, and means whereby the movement of the handle is causedto engage or disengage the clutch members, substantially as set forth.

12. Ina floor surfacing machine, the com- I bination of a carriage, an' abrading roll clutch members, substantially as set forth.

13. In a floor surfacing machine, the combination of av carriage, an abrading roll mounted thereon, propelling wheels for the carriage,'a propelling motor on the carriage,

mechanism connecting the motor with the propelling wheels comprising separable clutch members, a guiding. handle for the carriage extending rearwardly therefrom and upwardly and downwardly movable, a clutch shifting lever pivotally mounted on the handle and connected with one of said clutch members, and a cam on the carriage engaging said lever to shift the same when the guiding handle is raised or lowered, subrable clutch members, a guiding handle for' the carriage movable relative to the car-v riage, a clutch shifting lever pivotally mounted on the handle, engaging with one of said clutch members and having a spring controlled arm, and a cam on the carriage engaging said spring controlled arm to shift the lever when the guiding handle is oper-' ated relative to the carriage, substantially as set forth. In testimony whereof I aflix my signature in presence of two witnesses.

JOHN HERE. Witnesses:

H. N. Low, W. STRATON. 

